There are 2,500 varieties of apple trees in the US but, sadly, most of us don't have room to grow that many. If you have space to plant even one tree, though, you can harvest several varieties of fruit—thanks to the miracle of grafting:

Above: An Apple 4n1 Multiple Graft tree from Yamaguchi's Nursery in Cupertino, CA has Golden Delicious, Red Delicious, Gala, and Fuji apples growing on a single tree. For more information and prices, visit Yamaguchi's.

Above: Each multiple-graft tree starts with root stock, a hardy variety onto which others can be grafted.

Above: There are several grafting techniques. Here's one way to graft a new variety onto root stock: During a dormant season, split a host branch with a knife. Open the split with a screwdriver or similar tool and hold it open to Insert twigs—or scions— into the groove. For step-by-step instructions, see Small Kitchen Garden. Photograph via Small Kitchen Garden.

Above: How many years does it take for a new tree to begin bearing fruit? For an apple tree, from two to five years. For a sweet cherry tree, it can take from four to seven years. For other varieties, see Stark Bros.' Years to Bear Fruit list.